<template>
  <el-container class="container-box">
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="signOut">退出</el-button>
    </el-header>

    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-but" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="navPathName"
        >

          <el-submenu :index="item.id+''"  v-for="item in menuList" :key="item.id">

            <!--一级菜单-->
            <template slot="title">
              <!--一级菜单 图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--一级菜单 文本-->
              <span>{{ item.authName }}</span>
            </template>

            <!--二级菜单-->
            <el-menu-item @click="saveNavState('/'+children.path)" :index="'/'+children.path+''" v-for="children in item.children" :key="children.id">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ children.authName }}</span>
              </template>
            </el-menu-item>

          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>

  </el-container>
</template>

<script>
export default {
  name: "Home",
  data(){
    return {
      menuList: [],
      iconsObj: {
        '125': 'iconfont icon-users',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao',
      },
      isCollapse:false,
      // 默认的选择菜单
      navPathName:"/"
    }
  },
  created() {
    this.getMenuList(), // 获取左侧菜单栏
    this.navPathName = window.sessionStorage.getItem('navPath')
  },
  methods: {
    signOut(){
        window.sessionStorage.clear()  // 清楚token 信息
        this.$message.success('退出成功')
        this.$router.push('/login')
    },
    // 获取左侧菜单栏
    async getMenuList() {
      const {data: res} = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 菜单折叠展开
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    // 保存当前点击的菜单
    saveNavState(navPath){
      window.sessionStorage.setItem('navPath',navPath)
      this.navPathName = navPath
    }
  },

}
</script>

<style lang="less" scoped>
.container-box{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #FFFFFF;
  font-size: 20px;
  >div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right:none ;
  }
}
.el-main{
  background-color: #EAEDF1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-but{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
